• Caster Semenya breezes into 800m semi-finals at world championships• Asher-Smith qualifies in a season’s best 22.73sec

The inquest into what went wrong for British Athletics is already live while the championships are still ongoing and Britain’s hunt for a second medal endures. But amid the gloom a few athletes have outperformed expectations, chief among them Dina Asher-Smith.

The 21-year-old broke a foot in February and the prognosis was grim, it being an injury that has taken other athletes as much as two years to recover from. A couple of weeks later she had an operation in which the fracture to the navicular bone was fixed with a screw. Six weeks was spent on crutches and she was not able to run in spikes again until June.